<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>js的switch语句</title>
</head>
<body>
<p>点击下面的按钮来显示今天是周几：</p>
<button onclick="myFunction()">点击这里</button>
<p id="demo"></p>
<script>
    function myFunction() {
        var x;
        var d = new Date().getDay();
        switch (d) {
            case 0:x = "今天是星期日";
            break;
            case 1:x = "今天是星期一";
            break;
            case 2:x = "今天是星期二";
            break;
            case 3:x = "今天是星期三";
            break;
            case 4:x = "今天是星期四";
            break;
            case 5:x = "今天是星期五";
            break;
            case 6:x = "今天是星期六";
            break;
        }
        document.getElementById("demo").innerHTML=x;
    }
</script>
</body>
</html>